Drug interactions
Fluticasone furoate + Nirmatrelvir / ritonavir
Severity: Moderate
Fluticasone furoate and Nirmatrelvir / ritonavir: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Ritonavir-boosted nirmatrelvir strongly inhibits CYP3A4 and can raise fluticasone furoate exposure. Prolonged co-use may lead to Cushing syndrome and adrenal suppression, though a standard 5-day course carries limited risk.
What this interaction means in plain words
Fluticasone furoate and Nirmatrelvir / ritonavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Ritonavir and nirmatrelvir inhibit CYP3A4, decreasing fluticasone clearance.
What to do
Short courses generally need no change; for longer co-use, switch to beclomethasone or prednisolone and monitor for adrenal suppression.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Frequently asked questions
Can I take Fluticasone furoate with Nirmatrelvir / ritonavir?
MediHelp rates the interaction as moderate. Fluticasone furoate and Nirmatrelvir / ritonavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Ritonavir-boosted nirmatrelvir strongly inhibits CYP3A4 and can raise fluticasone furoate exposure. Prolonged co-use may lead to Cushing syndrome and adrenal suppression, though a standard 5-day course carries limited risk.
How serious is the interaction between Fluticasone furoate and Nirmatrelvir / ritonavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Short courses generally need no change; for longer co-use, switch to beclomethasone or prednisolone and monitor for adrenal suppression.
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